1747.62% is the change from 21 to 388
Calculation steps:
[( 388 - 21 ) ÷ 21] x 100 = 1747.62%
Formula
Percentage change = [(388 - 21) / 21] x 100
Subtract the new number by the original number
388 - 21 = 367
367 ÷ 21 = 17.476190476190474
17.476190476190474 x 100 = 1747.62%